Thursday, October 16, 2014

Species that don't get enough publicity #9: Rajasaurus narmadensis and the Lameta Formation

With the passing of the one-year anniversary, I’m going to
return to my peak output.I’ve been
distracted, but now I’m back.So today,
we’re going to feature another dinosaur.This one’s a fairly recent one, but part of an interesting story in both
its history as an animal and its history in paleontology.

Everyone loves the big scary dinosaurs. When William
Buckland was given a big jaw with a serrated, curved tooth from Stonesfield
quarry in1815, he was fascinated by it,
and thanks to the ferocious reconstruction by Benjamin Hawkins it became an
icon of antiquity. Cope’s Dryptosaurus in 1866 and Marsh’s Allosaurus 1877
brought dragons back to life. The apex came with the legendary Tyrannosaurus of
1905.People like their animals big,
scary, and extinct, and Tyrannosaurus is the epitome of all this.

So I’m not going to talk about Tyrannosaurus, but a
contemporary. This one’s been only described fairly recently, but its story is
intertwined with mysterious bones found in 1932. This is the story of
Rajasaurus, but it’s also a story of the Lameta Formation near the Narmada River
next to Jabalpur
in Madya Pradesh.

Our story begins in 1877 in the British Raj.Social reforms are on the rise. The middle
class of educated Indians is finally making strides. India has come a long way since the
oppression and exploitation of the EAC’s rule. British scientists scour the
now-stable area, studying the people, the animals, and the land itself. England is
still in the middle of its Indophilia, just not at the point of granting them
independence. The Russians and Germans, as well as the bloodbath of 1857, have
scared off that idea, but the few nationalists still cry out.

Natural Richard Lydekker begins the saga with his natural history
of India.
He finds sauropod bones. A world away, Othniel Charles Marsh discovers
Brontosaurus and Edward Drinker Cope discovers Camarosaurus, so Lydekker has no
idea what they are. There’s been giant bones like this before, but these seem
even bigger. Lydekker dubs this assortment of vertebra and limbs Titanosaurus.
He doesn’t know what kind of animal they are, only that they are of a giant
reptile that came much later than the dinosaurs he was familiar with.He finally classifies it as a sauropod dinosaur
in 1895, now that the giant American dinosaurs have been found.

1917. The rest of the empire shudders under the carnage of
the Great War, but India
remains safe. Geologist Charles Matley collects more bones near Jabbalpur. They
are a jumbled mess of various animals, but he recognizes carnivore teeth. He
calls it the Carnosaur Bed (Carnosauria is Frederick Von Huene’s invention,
containing all giant meat-eating dinosaurs).In 1923 he names one of the animals Lametosaurus after the locale, and
changes his mind that it’s a Carnosaur to that opinion that this animal is a
Stegosaur. It’s a jumbled mess of armored scutes, a fractured pelvis, and
carnivore teeth, all from different animals.The material’s all disappeared since then, leaving an enigma that may
never be solved.

A one inch theropod tooth is found by anH. C. Dasgupta in 1931, called
Orthogoniosaurus and mistakenly placed in the Triassic as a Massopondylid.
Suffice to say, it doesn’t count for much.

1933, however, was the field year. Mately returned, joined
forces with Von Huene, and they described no less than 8 new dinosaurs from
Lameta. Indosaurus, the skull roof of an allosaur (later discovered to an
abeliosaur), Composuchus, the neck of a
theropod, Coeluroides, the tail of a small theropod, Dryptosauroides another small theropod tail,Indosuchus, the skull fragments of a
medium-sized theropod, Antarctosaurus, the torso and limb of a big sauropod
(later given its own species Jainosaurus, as the original Antarctosaurus was a
distant relative from Argentia), Jubbulpuriayet another small theropod tail, Laevisuchus, the back and tail
bones of a small theropod, and Ornithomimoides another small theropod

With the exception of Jainosaurus and Indosuchus (which may
be the same animal as Indosaurus), most of the material is now either lost or
nondiagnostic. Suffice to say, there were many small theropods at Lameta.

One thing clarified the theropod situation, however- in
1985, Jose Bonaparte and Fernando Novas discovered two new theropod dinosaurs:
Abeliosaurus and Carnotaurus. These were contemporaries of the Lameta
dinosaurs, but from very complete specimens. Big predators, they were
determined to be neither related to Megalosaurus, Allosaurus, or Tyrannosaurus,
but descendants of the American horned carnivore Ceratosaurus. Abeliosauridae
was born.

In 1934 a new mystery specimen was found-Indian geologist
Dhirendra Kishore Chakravarti thought it resembled a
stegosaur, naming it Brachypodosaurus! Currently, the last of the Stegosaurs seemed
to be the Chinese Wuerhosaurus and the British Regnosaurus. It’s just a
humerus, but it hasn’t been given a good study, and it may not show any
distinguishing stegosaur features. Another late Cretaceous stegosaur,
Dravidosaurus from Ariyalur, has been discovered to be badly-preserved
plesiosaur material. Hopefully someday this mystery
will be solved.

In 1984, the definitive Indian titanosaur was finally found at Dongargaon
Hill near Manjar Sumba in Maharashtra. Sohan Jain and SaswatiBandyopadhyay of the Indian Statistical Institute named it Titanosaurus
colberti after the great paleontologist Edwin Colbert in 1997, but Jeffery
Wilson and Paul Upchurch found it distinctive enough to be it’s own species.
Isisaurus is named neither after the Egyptian goddess or the Muslim
fundamentalist polity, but for the Indian Statistical Institute to which it
belongs. Only the skull, hindlimbs, and feet are missing, giving a picture of a
60-foot animal with a very thick neck and long legs; a strange animal indeed.

The star of today’s article was found far away from the
Lameta site, although it is part of the same fossil formation as it stretches
across the north of the subcontinent.The Narmada river travels west from Madya Pradesh into Gujarat where it
empties into the Gulf of Khambhat, and it is at a small town called Raholi
that this animal was found.

In 1981, geologists G.N.
Dwivedi and D.M. Mohabey found Cretaceous fossils at a ACC Cement quarry near
Raholi, including large, round, dinosaur eggs. In 1982, Suresh Srivastava of the Geological Survey of Indiaretrieved a large, half-complete skeleton and
with the aid of his supervisors D.K. Bhatt, S. C. Pant and U.B. Mathur managed
to extract the bones. After a pause for input from Prof.Ashok Sahni and Ashu Khosla of Puynjab University,
Srivastava invited Gondawanan (the Southern continents of the Mesozoic,
Africa, India, Australia and South America)
paleontology experts Jeffery Wilson and Paul Sereno to help describe the
animal. In the meantime, more material was found from the Lameta site. In 2003,
they finally released the paper, naming this new predator Rajasaurus, king
lizard.

The
GSI has since made the Rajasaurus a mascot-an Indian equivalent of
Tyrannosaurus rex. A cast of the skull was sent to Kalkota’s Indian Museum.
Princess Aliya Babi (daughter of Nawab Muhammed
Salabat Khanji II) of Balasinore promotes the site and uses her
interest in paleontology to promote tourism and attention in Gujarat.

Two other predators have been found since
then, both also from Kheda District: the gracile sister taxon
Rahiolisaurusand the large snake
Sanajeh. Sanajeh, the size of a large boa constrictor but more closely related
to South American Najash , was found in a sauropod’s next among its eggs and
hatchlings. This raises the possibility that it fed on baby sauropods (the jaw
is not detachable as in many modern snakes, forcing the animal to eat smaller
prey).The giant (fragments suggest more
than 20 feet) snake Madstoia, its closest relative, was also found near titanosaurs,
and may have eaten larger individuals than Sanajeh.

Neither of them, however, were as massive as
Rajasaurus. 30 feet long, 4 tons in weight, it was the apex predator of the
ecosystem. The 2-foot skull, armed with serrated two-inch teeth, was built to
hack into sauropods and inflict bloody wounds. It was heavily built for an
abeliosaur, meaning it specialized in large prey.Like its contemporaries Carnotaurus from
South America and Majungasaurus from Madagascar, the skull was short and
deep. This meant it was sturdier, and in all three genera was thickened on top,
possibly to head-butt rivals during competition. They all were about the same
size, lived in similar habitats, and ate the same kind of prey. A smaller
European relative, Arcovenator, was also a contemporary, while Tyrannosaurus
and its sister genus Tarbosaurus ruled North America and Asia.

Rajasaurus, unless we find an even bigger
specimen, was not the largest abeliosaur, however. That prize goes to both the
middle Cretaceous Argentinian Ekrixinatosaurus unnamed species from the Turkana Grits in Kenya, both
more than 35 feet long. However, their specimens are not nearly as complete, or
in the case of the Kenyan monster, even published yet.In the meantime we have our southern triumvirate.

Carnotaurus is
quite popular, with many toys, many artistic depictions, a full-scale model
with realistic skin, and even played the villain in Dinosaur.Majungasaurus has been featured in the TV
documentaries Jurassic Fight Club, Planet Dinosaur, and Dinosaur Revolution,
with emphasis on its aggression and evidence of cannibalism.

Alas, among
Gondawanan animals, the Indians get the least attention. Rajasaurus is still
popular in India,
and the toy company CollectA has made a toy of it (like most of their figures,
sadly, the sculpting is atrocious), but it’s still very obscure. Every nation
wants their own dinosaur at the top, and like most nationalism, it gets very
old very quickly.Perhaps as India grows in
power and Indians become more educated and global, Rajasaurus will be the new
king.

So anyway, Hollywood, give this guy
a break. Museums, put him on display. Toy companies, here’s a new fresh face.
Authors, think about the crap you’re writing and how this genus could perk up
the place. And remember, shop Rajasaurus where you work or play.

About Me

Hi everyone! You may know me already, but 99% of you won't. I've decided to make a blog for myself. I'm a anthropology student who has returned to his original passion for palaeontology. Ever since I was little, I've been fascinated with the weird and wonderful animals that have inhabited our planet and I've made this blog to keep this in my mind and hopefully in yours. Most people blog about their interests, and while I've got a range of interests-see history and anthropology above, not to mention zoology, astronomy, art, cooking, science fiction and fantasy films and literature, and a myriad of others, the one I want to do for a living is the study of Earth's ancient past.

On this blog I'll review papers, talk about fossils, museums, and taxa, review art, film, literature, and our culture's view of paleontology, and share memories and insights. I've been inspired by the far better blogs of professional palaeontologists, and I'll share them as time goes on. I'm also open to requests and questions of opinions, the latest palaeo news, and discussions with other fans informal and professional.

I think this is going to have fun, and I'm hoping my readers will have just as much fun.

Copyright: All media and print reviewed belongs to the owners and publishers. Likewise, all art used for this blog belongs to their artists. This is a non-profit blog for education and entertainment.